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Chapter 1. Product Description

1.1 Computer Features and ModelsThe Compaq LTE 5000 Family of Personal Computers introduces a new

generation of performance notebook computers with advanced modularity,

Pentium processors with 64-bit architecture, PCI local bus graphics, and

extensive multimedia support. This full- function family of notebook

computers allows desktop functionality and connectivity via an optional

expansion base.

1.1.1 Computer Features

The Compaq LTE 5000 Family of Personal Computers has the followingstandard features:

o Extensive multimedia support with integrated 16-bit digital stereo audio

(Microsoft Windows Sound System and SoundBlaster Pro compatible), dual

speakers, microphone, full motion video support, optional CD-ROM drive,

and optional MPEG and TV Video Adapter

o 75, 90, 100, 120, 133, or 150-MHz Intel Pentium processor with 64-bit

architecture

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o 8 or 16 MB of RAM, expandable to 72 or 80 MB

o 512 KB of 64-bit write-back, synchronous, level-2 cache memory available

on the LTE5400 model; 256 KB of 64-bit write-back, synchronous,

level-2 cache memory available on all other models

o Upgradable flash ROM BIOS

o High-performance 32-bit PCI local bus graphics with hardware-assistedMotion Video Acceleration (MVA)

o Color TFT VGA or SVGA, CSTN VGA or SVGA, or CTFT 1024 x 768 display

panels

o Keyboard with built-in EasyPoint II pointing device and mouse buttons

o Removable hard drive

o MultiBay modular device bay that supports a CD-ROM drive, a second hard

drive, a second battery pack, or diskette drive, and a full-length ISA

slot that allows addition of an ISA expansion board (ISA slot available

with MultiBay ISA Expansion Base only)

o Two Type III PC Card (PCMCIA) slot that supports one Type III, two Type

I, or two Type II PC Cards, LAN connection or data/fax modem

o Infrared port for IrDA wireless data transfer, printing, and drive

synchronization

o Ports and connectors for external equipment (see Section 1.3)

o Preinstalled software

o Security features

o Desktop functionality available with the optional Compaq LTE 5000MultiBay Expansion Base or MultiBay ISA Expansion Base.

1.1.2 Computer Models

The Compaq LTE 5000 Family of Personal Computers is available in the

models shown in Table 1-1.

Table 1-1. Compaq LTE 5000 Family of Personal Computers Models

===========================================================================

Model Processor Display Hard Drive CD-ROM Drive

===========================================================================

LTE 5000 Model Pentium/75 10.4-inch 510 MB Optional

510 CSTN CSTN/VGA

---------------------------------------------------------------------------LTE 5000 Model Pentium/75 11.3-Inch 810 MB Optional

810 CSTN CSTN/SVGA

---------------------------------------------------------------------------

LTE 5000 Model Pentium/75 10.4-Inch 810 MB Optional

810 CTFT CTFT/VGA

---------------------------------------------------------------------------

LTE 5100 Model Pentium/90 10.4-Inch 810 MB Optional

810 CTFT CTFT/SVGA

---------------------------------------------------------------------------

LTE 5100 Model Pentium/90 10.4-Inch 810 MB Yes

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810 CD CTFT CTFT/SVGA

---------------------------------------------------------------------------

LTE 5150 Model Pentium/100 11.3-inch 810 MB Yes

810 CSTN 800 CTFT/SVGA

x 600

---------------------------------------------------------------------------

LTE 5200 Model Pentium/120 10.4-inch 1.35 GB Optional

1350 CTFT CTFT/SVGA

---------------------------------------------------------------------------LTE 5250 Model Pentium/120 10.4-inch 810 MB Yes

810 CTFT CTFT/SVGA

800 x 600

---------------------------------------------------------------------------

LTE 5280 Model Pentium/120 11.3-inch 810 MB Yes

810 CTFT CTFT/SVGA

800 x 600

---------------------------------------------------------------------------

LTE 5280 Model Pentium/120 11.3-inch 1.35 GB Yes

1350 CTFT CTFT/SVGA

800 x 600

---------------------------------------------------------------------------

LTE 5300 Model Pentium/133 12.1-inch 1.35 GB Yes

1350 CTFT CTFT/SVGA800 x 600

---------------------------------------------------------------------------

LTE 5300 Model Pentium/133 12.1-inch 2.16 GB Yes

2160 CTFT CTFT/SVGA

800 x 600

---------------------------------------------------------------------------

LTE 5380 Model Pentium/133 12.1-inch 2.16 GB Yes

2160 CTFT CTFT/10 X 7

1024 x 768

---------------------------------------------------------------------------

LTE 5400 Model Pentium/150 12.1-inch 2.16 GB Yes

2160 CTFT CTFT SVGA

800 x 600===========================================================================

1.1.3 Preinstalled Software

The computer can have either Windows 3.1 or Windows 95 installed.

Windows 3.1 Software Components

The following software is preloaded if Windows 3.1 is installed:

o MS-DOS 6

o Microsoft Windows 3.1

o Cirrus GD-754x Video Driver

o TEAC CD-40E CD-ROM Driver and CD Audio Player for DOS

o ESS Audio Driver and Audio Clip Library

o Compaq Sound System Version 1.70

o Compaq Network Interface Drivers

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o Compaq PCMCIA 3.14

o Logitech Mouse Ware 6.46

o PUMA TranXit Version 1.03

o Microsoft Video for Windows 1.10e (Runtime version)

o Machine Check Version 1.1 (MACHCHK.SYS)

o SystemSoft Suspend-To-Disk Utility 2.20.00 (0VMAKFIL.EXE)

o Compaq Supplementary Programs

o Microsoft Supplementary Programs

o SAFETY & COMFORT GUIDE

o COMPAQ DICTIONARY

o COMPAQ USER'S GUIDE

o ONLINE OPTIONS CATALOG

o Compaq Diagnostics for Windows 1.05

o CompuServe WinCIM (1.4/1.2/1.31D/1.31F)

o America Online for Windows (North America only)

Windows 95 Software Components

The following software is preloaded if Windows 95 is installed:

o Cirrus Logic GD-754x Video Driver

o TEAC CD-40E CD-ROM Driver

o Compaq PCMCIA 3.14 Installer for Windows 95

o Logitech Mouse Ware 6.50

o Machine Check Version 1.1 (MACHCHK.SYS)

o SystemSoft Suspend-To-Disk Utility 2.20.00 (0VMAKFIL.EXE)

o Microsoft Infrared Monitor and Direct Cable Connect

o SAFETY & COMFORT GUIDE

o COMPAQ DICTIONARY

o COMPAQ ONLINE USER'S GUIDE

o ONLINE OPTIONS CATALOG

1.1.4 Intelligent Manageability

Intelligent Manageability combines innovative hardware technology with PC

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LAN management tools from Compaq and other leading vendors to make Compaq

portable computers easier to inventory, troubleshoot, and protect.

Asset Management

AssetControl is asset management software designed to cut the time and

cost of conducting a physical inventory of personal computers, key

components, and monitors. AssetControl is preinstalled on portable

computers, key components, and monitors that support the Video ElectronicsStandards Association Data Display Channel (VESA DDC) and Extended Display

Identification Data (EDID) standards.

AssetControl features make it easy and inexpensive to maintain an

accurate, up-to-date inventory. Detailed inventory information, including

manufacturer, model, serial number, asset tag, and ROM revision level can

be viewed, printed, or saved electronically using Compaq Insight Personal

Edition or Compaq Insight Manager.

Compaq Insight Personal Edition refers to Intelligent Manageability

software that diagnoses portable computer hardware, monitors the internal

system temperature and IntelliSafe hard drive, and then displays a

prefailure warning message on detecting a system temperature or hard drive

fault.

Compaq Insight Manager refers to Information Manageability software that

helps manage servers and personal computers on a network. Compaq Insight

Manager features intelligent monitoring and alerting, remote maintenance,

and visual control of network resources.

Fault Management

Fault Management is a utility designed to help prevent the loss of

critical data. This feature is available only in the 2.16GB DFP (SMART

system compliant drives). Fault Management has the following features:

o SMART (IntelliSafe) hard drive - Constantly monitors hard drive activityto predict failures before they occur.

o Temperature sensing - Hardware and software that tracks the internal

temperature of the computer and displays a warning message when the

normal range is exceeded.

Compaq Insight Personal Edition displays a pop-up message to notify you

when a hard drive or system temperature fault is detected. If the computer

is connected to a network managed by Compaq Insight Manager, fault notices

are also sent to the network management application.

Security Management

The security management utility provides a set of security features toprotect the computer and data from unauthorized access.

o Passwords - Prevents unauthorized access to information stored on the

computer or network.

o Drive security - Prevents starting the computer from the diskette drive

and reading information from the diskette drive.

o Device disabling - Prevents unauthorized data transfer over fax/modems,

serial ports, parallel ports, and infrared ports.

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1.1.5 Security Features

The computer has the following security features:

o Ability to secure drives in the dedicated hard drive bay and computer

MultiBay

o Ability to secure the computer and either MultiBay Expansion Base to animmovable object with an optional cable lock

o Ability to establish power-on and setup passwords and to disable ports

and devices from the Security menu in Computer Setup

1.1.6 Power Management

Power Management offers three levels of power conservation:

o High: Provides the maximum amount of power conservation and the maximum

battery operating time from a single charge.

o Medium: Provides a balance between performance and battery life (factory

default).

o Custom: Conserves power according to user-specified timeout settings.

The conservation level sets the timeouts for Standby (Suspend),

Hibernation, drives, and screens. Use the Fn+F7 hotkeys to toggle off and

on the power management settings in Computer Setup and Windows Power

Properties.

Selecting to disable the infrared port under the Security menu also

conserves power.

Chapter 1.2 Computer OptionsThe options that are available from Compaq for the computer are described

in the following sections.

1.2.1 MultiBay Expansion Base and MultiBay ISA Expansion Base

The MultiBay Expansion Base and the MultiBay ISA Expansion Base provide

two additional MultiBay device bays, two PC Card Type III slots,

integrated Ethernet, integrated stereo speakers, and computer I/O port

replication. The expansion bases are described in Section 1.5. When the

computer is docked in an expansion base, the total system functionality

includes:

o Support for up to three MultiBay devices simultaneously

o Overall system support for up to four hard drives or two diskette drives

o Up to three CD-ROM drives installed as follows:

- Three CD-ROM drives: The two in the expansion base must be used for

data; the CD-ROM drive in the computer can then be used for audio or data.

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- Two CD-ROM drives: You can have one in the expansion base and one in

the computer; either drive can be data or audio. If both drives are in

the expansion base, they must be for data only.

- One CD-ROM drive: It can be either data or audio and in either the

computer or expansion base.

o Two Type III PC Card slots

o Overall system support for up to four PC cards

o Charging of up to four battery packs

The MultiBay ISA Expansion Base provides the same functionality as the

MultiBay Expansion Base, with the following additional features:

o One ISA Expansion slot allows ability to add a full-length ISA expansion

board

o Additional ventilation exhausts on both sides of the expansion base for

increased ventilation

o High performance stereo speakers and new audio bass ports on both sides

of the expansion base for "PremierSound" CD-quality audio

1.2.2 System Memory Options

The main memory subsystem supports a minimum standard 8 MB or 16 MB of

DRAM, expandable to a maximum of 72 or 80 MB. The minimum standard DRAM is

integrated on the processor board. The upgrade DRAM is accomplished with

memory expansion boards that are available in 8, 16, 32, and 64 MBincrements. The memory expansion boards require no special tools for

installation and can be installed by the inexperienced user. System memory

can be upgraded according to the schedule in Table 1-2:

Table 1-2. Memory Upgrade Schedule

===========================================================================

Base Memory Memory Expansion Board Total Memory

===========================================================================

8/16 MB None 8/16 MB

8/16 MB 8 MB 16/24 MB

8/16 MB 16 MB 24/32 MB

8/16 MB 32 MB 40/48 MB

8/16 MB 64 MB 72/80 MB

===========================================================================

1.2.3 Mass Storage Options

The following mass storage options are available for the computer:

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o 3.5-inch 1.44 MB Diskette Drive

o 510 MB IDE Hard Drive

o 810 MB IDE Hard Drive

o 1.35 GB IDE Hard Drive

o 2.16 GB w/DFP IDE Hard Drive

o 2.16 GB IDE Hard Drive

Diskette Drive

The computer uses a 3.5-inch diskette drive that is enclosed in a module

that fits into the MultiBays of the computer or the MultiBay Expansion

Base and the MultiBay ISA Expansion Base. The diskette drive is a

three-mode type that is compatible with 1.44 MB, 1.2 MB and 720K AT drive

types. The system supports a maximum of two diskette drives: one in the

computer, one in the MultiBay Expansion Base. When using Windows 95, realmode drivers must be used for a diskette drive in the expansion base. For

more information see "Solving Diskette and Diskette Drive Problems" in

Chapter 2.

Hard Drive

The computer supports an IDE hard drive in the dedicated hard drive bay.

Cable select technology is employed for device 0/device 1 (master/slave)

selection. The hard drive can be locked in place with the hard drive

security screw installed adjacent to the hard drive release on the bottom

of the computer. See Appendix C for information on using Compaq LTE Elite

hard dives in the computer.

1.2.4 CD-ROM Drive

The modular, 2x, 4x, and 6x CD-ROM drives are available from Compaq as a

standard model or an option for the computer or either expansion base. The

CD-ROM drive is compatible with industry-standard CD-ROM disc media and

formats. It can read:

o CD-Digital Audio

o CD-ROM Mode 1 and Mode 2

o CD-ROM/XA Mode 2 (Form 1 and Form 2)

o CD-I Mode 2 (Form 1 and Form 2)

o Video CD

o Photo CD (single and multisession)

o ISO 9660 and High Sierra

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1.2.5 MPEG and TV Video Adapter

The MPEG and TV Video Adapter option is supported with the computer and

both expansion bases. This option provides an MPEG decoder for high

quality digital video playback with Windows scaling and interleaved stereo

audio, S-Video I/O for laser disc quality playback video, and composite

video supporting the NTSC/PAL formats.

1.2.6 Miscellaneous Options

The following options for the computer are also available from Compaq:

o AC Adapter

o Automobile Adapter

o NiMH Battery Pack

o Battery Fastcharger

o Enhanced III External Keyboard

o Compaq Mouse

o Carrying Case

o MultiBay Device Carrying Case

o MultiBay Hard Drive Adapter

AC Adapter

The AC Adapter supplies DC voltage to the system DC-to-DC converter for

use by the system to operate and/or charge the installed battery pack(s).

The adapter provides sufficient power to charge each main battery pack in

1.5 hours or less with the system off. The adapter also powers the Battery

Fastcharger.

Automobile Adapter

The Automobile Adapter is used to charge the computer from an automobile

battery. It also powers the Battery Fastcharger.

External Battery Fastcharger

The external Battery Fastcharger is available from Compaq and has the

following features:

o Two battery charge bays

o Fast charging of one battery in 1.5 hours

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o Fast charging of two batteries in 3 hours

It requires the AC Adapter or Automobile Adapter for power.

Chapter 1.3 Computer External ComponentsThe external components on the front and right sides of the computer are

shown in Figure 1-2 and are described in Table 1-3.

Table 1-3. Computer Components - Front and Right Sides

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===========================================================================

Item Component Function

===========================================================================

1 Power switch Turns the power on and off.

---------------------------------------------------------------------------

2 Display switch Turns display off and initiates beep if

display is closed with computer on. When

used with the standby button, restarts the

computer.---------------------------------------------------------------------------

3 Standby switch Initiates/exits Standby. When used with

the display switch, restarts the

computer. When used with the Fn key,

initiates Hibernation.

---------------------------------------------------------------------------

4 Status panel icons The computer is connected to an external

power source.

QuickLock/QuickBlank has been initiated.

Type the power-on password on the

blank screen to exit

QuickLock/QuickBlank.

Power Management is turned on. Run

Computer Setup to view or change

Power Management settings.

A diskette drive in the MultiBay is

being accessed.

A hard drive in the dedicated hard

drive bay or a hard drive or CD-ROM

drive in the MultiBay is being accessed.

An external monitor is actively

displaying information.

The built-in speakers on the front of the

display or speakers or headphone

connected to the computer or expansion

base are turned on.

Num lock is on, which enables the

embedded numeric keypad.

Caps Lock is on, which causes new text

to be typed in uppercase letters.

Scroll Lock is on, which causes the

cursor to scroll by fields, rather thanby lines.

Battery gauges 1 and 2. Gauge 1 turns on

if a battery pack is in the dedicated

battery bay and shows the amount of

charge in the battery pack. Gauge 2 turns

on if a battery pack is in the MultiBay

and shows the amount of charge in that

battery pack.

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---------------------------------------------------------------------------

5 Ventilation intake Intake vents provide proper airflow to

help prevent the computer from

overheating.

---------------------------------------------------------------------------

6 Stereo speakers Built-in stereo speakers for PC and

multimedia sound system.

---------------------------------------------------------------------------7 Latch Secures computer in a closed position;

release to open.

---------------------------------------------------------------------------

8 Brightness control Adjusts the brightness of the display.

Contrast control (not Adjusts the contrast of the display

shown) (CSTN models).

---------------------------------------------------------------------------

9 Standby (suspend) light Illuminates when power to the computer

(green) is turned on. Blinks to indicate

computer is in Standby (Suspend).

---------------------------------------------------------------------------

10 Battery light (yellow) Illuminates when a battery pack is

charging; turns off when the batterypack is fully charged; blinks to

indicate low battery.

---------------------------------------------------------------------------

11 Microphone Built-in microphone for the Compaq

Sound System.

---------------------------------------------------------------------------

12 PC Card slots Accepts one Type III or two Type II or

two Type I PC Cards (PCMCIA).

---------------------------------------------------------------------------

13 Battery release Releases a battery pack in the battery

compartment.

---------------------------------------------------------------------------

14 Keyboard Keyboard with EasyPoint II pointingdevice and pick buttons.

---------------------------------------------------------------------------

15 Battery compartment Dedicated battery compartment for the

main battery pack.

---------------------------------------------------------------------------

16 Hard drive bay Dedicated hard drive bay.

---------------------------------------------------------------------------

17 MultiBay Bay that supports multiple devices:

CD-ROM drive, hard drive, battery pack,

or diskette drive.

===========================================================================

The external components on the rear and left sides of the computer areshown in Figure 1-3 and described in Table 1-4.

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Table 1-4. Computer Components - Rear and Left Sides

===========================================================================

Item Component Function

===========================================================================

1 Serial number Identifies the computer.

---------------------------------------------------------------------------

2 Serial connector Connects optional serial devices.

---------------------------------------------------------------------------

3 Parallel connector Connects optional parallel devices.

---------------------------------------------------------------------------

4 External options Connects the expansion base or the

connector optional Automobile Adapter.

---------------------------------------------------------------------------

5 External monitor connector Connects an external monitor.

---------------------------------------------------------------------------

6 Power connector Connects the AC Adapter or the

optional Automobile Adapter.---------------------------------------------------------------------------

7 Stereo speaker/headphone Connects external speakers or

jack headphones.

---------------------------------------------------------------------------

8 Stereo line in jack Stereo line-in jack for CD player,

tape deck, tuner, or other line level

audio source.

---------------------------------------------------------------------------

9 Keyboard/mouse connector Connects an external keyboard, numeric

keypad, PS/2 mouse, or other pointing device.

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---------------------------------------------------------------------------

10 Docking sensor Access to a microswitch that initiates

the docking scenario when the computer

is being docked. Also serves as a

guide for the MPEG Adapter.

---------------------------------------------------------------------------

11 Mono microphone jack Connects a powered electric condenser

microphone.---------------------------------------------------------------------------

12 Volume control Controls volume to the built-in

speakers or to external speakers or

headphones connected to the computer

or MultiBay Expansion Base.

---------------------------------------------------------------------------

13 MultiBay device release Releases a drive or battery pack from

the MultiBay.

---------------------------------------------------------------------------

14 Ventilation exhaust Exhaust vent for proper airflow to

help prevent the computer from

overheating.

---------------------------------------------------------------------------

15 Infrared port Transfers data to another computer orexternal device that accepts IrDA

format.

---------------------------------------------------------------------------

16 Security slot Provision for an optional security

cable lock to be attached to the

computer.

===========================================================================

Chapter 1.4 Design Overview - ComputerThis section presents a design overview of the computer. The discussion is

limited to the field replaceable parts. All replaceable parts are

identified in Chapter 3, and removal/replacement procedures are presented

in Chapter 5.

The computer is a traditional clamshell design with a display unit and

system unit. The computer opens to reveal a backlighted LCD display and

keyboard. The display is designed for a continuously adjustable tilt

angle. The system unit houses the system board, processor board, power

board, keyboard, I/O ports, operator controls and indicators, mass storage

device bays, and battery bay.

The main components of the system unit include the following:

o Processor (Intel Mobile Pentium 75 MHz, 90MHz, 100MHz, 120MHz, 133mhz,

or 150 MHz)

o System controller (OPTi 556/557/558N, OPTi 602A)

o VGA controller (Cirrus CL-GD754x)

o Keyboard controller (Intel 80C51SL)

o PCMCIA controller (Cirrus 6722)

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o Super I/O (National 87334)

o Audio controller (ESS688 or ESS1688)

o Power controller (47P440AF)

The boards on which these controllers reside are identified in thesections that follow.

1.4.1 Display Unit

The display unit includes the following field replaceable components:

o Display assembly

o Display bezel with speakers

o Release latches

o Brightness control actuator

o Contrast control actuator (CSTN models only)

o Clutch assemblies

o Compaq logo

Display Assembly

The display assembly is replaced as a complete unit that includes:

o LCD panel

o LCD inverter

o Display bezel

o Stereo speakers

o Clutch assemblies

o Release latches

o Brightness control actuator

o Contrast control actuator (CSTN models only)

NOTE: The display bezel, release latches, brightness/contrast control

actuator(s), Compaq logo, and clutch assemblies can also be replaced

individually. The speakers are permanently installed on the display

bezel.

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The following LCD panels are supported:

o 10.4-inch (26.4 cm) CSTN VGA Display (640 x 480)

o 11.3-inch (28.7 cm) CSTN SVGA Display (800 x 600)

o 10.4-inch (26.4 cm) CTFT VGA Display (640 x 480)

o 10.4-inch (26.4 cm) CTFT VGA Display (800 x 600)

o 11.3-inch (28.7 cm) CTFT SVGA Display (800 x 600)

o 12.1-inch (30.7 cm) CTFT SVGA (800 x 600)

o 12.1-inch (30.7 cm) CTFT 1024 x 768 Display

Both LCD panels have a controllable backlight intensity that can be

adjusted with a slide switch. The CSTN (dual scan) panels also have a

slide switch for contrast control.

The LCD panel inverter cable plugs into an 8-pin connector on theprocessor board. The LCD cable plugs into a connector on the system board.

The inverters and cables differ according to the display type and

manufacturer and cannot be interchanged. All of the display cables are

routed to the system unit in the vicinity of the clutches.

NOTE: It is important that these instructions be followed when replacement

of any part requires removal of the display assembly.

Slide the display assembly back in place and replace all screws. The

screws must be fully tightened to ensure that they do not touch the

expansion base sensor located near the left hinge. Failure to properlyseat the screws may prevent the unit from booting up.

NOTE: Use Fn+F4 hotkeys to switch between external, internal, and

simultaneous display. (The CSTN 800 x 600 does not support

simultaneous display.)

Display Bezel With Speakers

The display bezel attaches to the display unit with a snap action and is

secured with a screw at each corner. Screw covers are installed over the

screw heads. After removing these screws, use a Compaq bezel removal tool

to separate the bezel from the display assembly. The display bezel can beremoved without separating the display unit from the system unit.

The internal stereo speakers are 0.5-watt, 8-ohm, permanently installed in

the top corners of the display bezel and are installed as a unit with

cabling attached. The speaker cable is routed into the system unit and

connects to a 4-pin connector adjacent to the 30-pin LCD connector on the

system board. The CPU cover is easily removed from the system unit to

access this connector.

NOTE: Use Fn+F5 hotkeys to toggle speakers/headphones off and on.

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Release Latches

The release latches serve to lock the display and system units together

when the computer is in the closed position. Each latch assembly consists

of three parts:

o Latch actuator

o Latch hook

o Latch spring

The release latch assembly is available as a field replaceable unit. The

display bezel must be removed to replace the latch assemblies.

The release latches are mounted in the display unit back cover. The

display bezel must be removed to access the latches. The latches snap into

place and require a simple depression of a tab to be released from the

display cover.

Brightness/Contrast Control Actuator(s)

The displays have a controllable backlight intensity that can be adjusted

with a slide switch. The CSTN panels also have slide switch for contrast

control. The actuators for these adjustments are available as field

replaceable units.

The brightness/contrast control actuator(s) (contrast control actuator on

CSTN displays only) are mounted on the display bezel with a snap action.

The display bezel must be removed to allow the tabs on the back side of

the actuator to be depressed for removal. When installing a display bezel,

make certain the brightness/contrast actuator(s) aligns with the

brightness/contrast control(s) in the display assembly.

Clutch Assemblies

The clutch assemblies provide the hinge function between the display unit

and system unit and also provide continuous tension that allows the

display unit to be positioned at any angle.

The clutch assemblies are available in pairs as field replaceable units.

Each clutch assembly is mounted to the display unit with two screws and to

the system unit with two screws. Removal and replacement of the clutch

assemblies requires removal of the display bezel and the CPU cover (on the

system unit).

Compaq Logo

The Compaq logo is installed on the back of the display unit. The location

for the logo is indicated by an ellipse embossed in the cover. The logo is

an adhesive-backed label that is available as a field replaceable unit.

The label indicates which processor is installed in the computer.

1.4.2 System Unit

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The system unit contains the following field replaceable units:

o CPU cover

o Internal microphone

o Status panel

o Processor board

o Power board

o Cooling fan

o System board

o Memory expansion board (optional)

o Keyboard assembly

o Auxiliary battery

o Miscellaneous plastic parts

CPU Cover

The CPU cover is located above the keyboard and is secured in place with

three screws on the rear panel of the system unit. Tabs on the front edge

of the CPU cover engage slots across the top edge of the keyboard panel.

The CPU cover contains the actuators for the following:

o Power switch

o Standby (Suspend) button

o Display switch

The CPU cover with all switch actuators installed is available as a field

replaceable unit. The switch actuators are also available as field

replaceable units.

The power switch actuator and spring and the standby (suspend) button

actuator and spring are removed by squeezing the actuator tabs on the

underside of the CPU cover and pushing the buttons out of their mounting

hole. The display switch actuator simply snaps out of its mounting holefrom the underside of the CPU cover.

The CPU cover must be removed to service any of the above described switch

actuators. The cover also must be removed to disconnect any of the display

unit cables from the system unit, to remove the display unit, to service

the status panel, and to remove the keyboard assembly.

Internal Microphone

The internal microphone is supported by the audio subsystem and connects

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The L2 cache is implemented as direct-mapped, write-back cache with a size

of 256 KB.

The power switch, display switch, and standby (suspend) button are mounted

on the processor board. They are operated by switch actuators mounted on

the CPU cover.

The power switch turns system power on and off. When the switch is pushed

to turn the power off, the system displays a warning message that allunsaved data will be lost. The shut down process is then completed by

pressing Enter.

The display switch turns the display off and initiates a beep if the

display is closed with the computer on. When used with the standby switch,

the display switch initiates a system restart.

The standby (suspend) button initiates and exits Standby (suspend). As

described above, the standby button, when used with the display switch,

initiates a system restart. When used with the Fn key, the standby button

initiates Hibernation.

The processor board contains 8 MB or 16 MB of onboard memory and can be

expanded to 72 or 80 MB by adding a 64 MB memory expansion board. Thememory expansion boards are available in 8, 16, 32, and 64 MB DRAM

configurations. Each module is composed of two boards assembled together.

The system ROM is shadowed in system memory.

The infrared subsystem (IrDA) provides two-way wireless communication

using infrared as a transmission medium. Proper operation requires the

communicating infrared ports to be within a 30-degree path and no more

than three feet (1 meter) apart.

The processor board must be configured according to the display type. This

is done by setting Jumpers JP2, JP3, and JP4 on the processor board. Use

Table 1-5 to determine proper jumper settings for the display.

Table 1-5. Display Configuration Jumpers

===========================================================================

Display Type Jumper JP3 Jumper JP2 Jumper JP4

===========================================================================

LTE 5000 10.4 in VGA CSTN 1-2 2-3 1-2

LTE 5000 10.4 in VGA CTFT 2-3 2-3 1-2

LTE 5000 11.3 in SVGA CSTN 1-2 2-3 2-3

LTE 5100 10.4 in SVGA CTFT 2-3 2-3 2-3

LTE 5200 10.4 in SVGA CTFT 2-3 2-3 2-3

LTE 5280 11.3 in SVGA CTFT 2-3 2-3 2-3

LTE 5300 12.1 in SVGA CTFT 2-3 2-3 2-3

LTE 5150 Rev. 4X 11.3 in

SVGA CSTN 1-2 1-2 1-2

LTE 5150 Rev. 2X SVGA CSTN 2-3 1-2 1-2

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LTE 5250 10.4 in SVGA CTFT 2-3 2-3 2-3

LTE 5380 12.1 in 1024 x 768

CTFT 2-3 1-2 1-2

LTE 5400 12.1 in 1024 x 768

CTFT 2-3 2-3 2-3

===========================================================================

The power-on password jumper is also located on the processor board. To

erase the power-on password, set jumper JP1 to pins 1 and 2; set JP1 to

pins 2 and 3 for normal operation. See Chapter 2 for more details.

To remove and replace the processor board, you must first remove the CPU

cover, EMI shield, keyboard, and display unit. The processor board is

secured in place with two screws and is connected to the system board with

two connectors.

System Board

There are three system boards for the computer: one to support the 75 MHz,

90 MHz and 120 MHz processors (LTE 5000, LTE 5100, and LTE 5200); one tosupport the 120 MHz, 100MHz, and 133 MHz processors (LTE 5280, LTE 5300,

LTE 5150, and LTE 5250); and one to support the 133 MHz processor (LTE

5380) and 150MHz processor (LTE 5400). The system board supports the

following:

o System ROM (BIOS)

o Graphics subsystem

o Audio subsystem

o PC Card subsystem

o Diskette drive controller

o RS-232 and IrDA serial ports

o IDE interface

o Fan connector

o I/O connectors

The firmware components for the computer include:

o System BIOS for the OPTi Viper Notebook chip set

o ROM-based setup

o MAXIMIZER Power Management for OPTi Viper

o APM 1.1 BIOS

o Plug and Play BIOS

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o PCI BIOS

o Keyboard Controller Firmware for the Intel 80C51SL

o VGA BIOS

The ROM-based setup has been translated into ten languages in addition toEnglish. Messages that are displayed by the BIOS which require no user

interaction are displayed in English. This includes POST warning messages,

error messages, and runtime warnings and notifications. Messages that are

displayed by the BIOS which require user interaction are translated into

the same language as Setup.

The graphics controller interfaces with the system through the PCI bus.

The controller provides backward compatible modes to support CGA, EGA,

MGA, and HGA as well as all current VGA and SVGA modes. The controller

supports the internal LCD panels as well as an external CRT and

simultaneously supports the LCD and CRT (except for models with the

11.3-in CSTN SVGA display). The CRT interface is also routed to the either

expansion base through the external options connector. For LCD only andLCD/CRT simultaneous display modes, the following panel and color

resolutions are supported:

Table 1-6. Maximum Resolutions Supported

===========================================================================

Display Type Display Modes Color Depth Supported

===========================================================================

640 x 480 CTFT 640 x 480 256, 64K, 16M

800 x 600 CTFT 640 x 480, 800 x 600 256, 64K

640 x 480 CSTN 640 x 480 256, 64K

800 x 600 CSTN 640 x 480, 800 x 600 256

1024 x 768 CTFT 1024 x 768 256

===========================================================================

The graphics controller also supports display of real-time video from the

MPEG and TV Video Adapter at a rate of 30 frames per second (fps). It

provides the capability to overlay the video in a Windows screen.

The computer has 1 MB of video DRAM soldered to the system board. There

is no provision for adding additional video memory.

The graphics subsystem is designed to minimize the use of power at alltimes. When the system is idle for a set period of time, the controller is

placed in the lowest power state. The LCD panel backlight and panel power

are turned off during periods of inactivity after a timeout as determined

by the user in Computer Setup. The system supports Energy Star monitors

and allows the feature to be turned on/off from Computer Setup.

The computer supports an interface to an MPEG and TV Video Adapter that

attaches to the rear of the computer. The adapter provides up to 30 fps of

live video or MPEG video to the graphics controller for display on the

LCD, a CRT, or a television. The MPEG and TV Video Adapter and CD-ROM

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drive can be used simultaneously.

The audio subsystem is integrated into the system board. The system

supports an internal microphone, stereo speakers, SoundBlaster PRO

compatible audio, CD-ROM audio inputs, an external jack for headphones or

speakers, microphone jack, and line-input jack. Line and CD-ROM inputs and

the speaker outputs are passed through the external options connector and

supported by both expansion bases.

The internal speakers are disabled when the computer is docked in the

expansion base and when headphones or external speakers are installed.

The heart of the audio subsystem is the ESS1688 (ESS688 on Windows 3.1/Dos

6 units) AudioDrive ASIC that provides 16-bit stereo WAV audio, audio

mixing, and FM music synthesis. The entire audio system connects directly

to the ISA bus.

The ESS1688 is OPL3 compatible and compatible with SoundBlaster PRO and

Microsoft Windows Sound System. It can record, compress, and play back

sound and music at 8 or 16 bits up to 44 Khz.

The computer has one PC Card (PCMCIA) controller that supports a Type III

PC card slot that supports either two Type II PC Cards or one Type III PCCard. A PC card door prevents contamination of the slot. The controller is

Intel ExCA compatible and complies with the Berlin revision of the PCMCIA

standard. The controller supports 5-V cards and all current Compaq PC

Cards. A second PC Card controller is located in both expansion bases.

The diskette drive controller supports 720K, 1.2 MB, and 1.44 MB densities

as well as automatic media detection. Diskette drives can be used in the

computer MultiBay and the expansion bases. When using Windows 95, real

mode drivers must be used for a diskette drive in the expansion base. For

more information see "Solving Diskette and Diskette Drive Problems" in

Chapter 2.

The PC87334 Super I/O contains two UARTs which are fully compatible withNS15450 and NS16550. Both ports support MIDI baud rates and one port also

supports IrDA and HP SIR compliant signaling protocol. The two serial

ports are configured as one RS- 232C serial port and one infrared (IrDA)

port.

o The standard RS-232 serial port has an 82550 compatible serial

controller. The physical connector is a standard 9-pin D connector. The

interface can be configured as COM1, COM2, COM3, or COM4.

o The infrared communication is implemented with an 82550 compatible

serial controller. The minimum data rate supported by the Infrared Port

is 115K bits per seconds. The interface can be configured as COM1, COM2,

COM3, or COM4.

The parallel port support is integrated into the PC87334 Super I/O. The

computer has one parallel port that can be configured to operate in

compatible mode, enhanced modes 1.7 and 1.9 (EPP), and extended

capabilities (ECP) mode (IEEE-1284 compatible). The default mode is the

compatible mode. The physical connector is a standard 25-pin D connector.

The parallel port interface can be configured as LPT1, LPT2, or LPT3.

When the computer is mounted in either expansion base, the system can

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support up to four IDE hard drives. When using two hard drives in the

computer, one of the hard drives is installed in the dedicated hard drive

bay and the other in the MultiBay.

NOTE: The dedicated hard drive bay provides limited support for the Compaq

LTE Elite hard drive. See Appendix C for details.

The hard drive remains powered off from Standby (Suspend) until the first

access occurs. The hard drive is powered off during Standby (Suspend).

The cooling fan is mounted in the system unit on the left side at the

ventilation exhaust port. Functioning as an exhaust fan, it provides air

flow across the electronic components for cooling. The fan plugs into a

2-pin connector on the system board.

The I/O connector panel is an integral part of the system board. In

addition to the I/O panel, the system board supports the following:

o PC card rails and connectors

o Battery bay contacts

o Hard drive bay connector

o MultiBay mass storage device connector

o MultiBay battery contacts

o Power board connectors

o Processor board connectors

o Fan connector

o LCD panel connector

o Speaker connector

o Integrated microphone connector

o External microphone connector

o Volume control

The CPU cover, display unit, keyboard, processor board, and power board

must be removed prior to removing the system board. The system board issecured with two screwlocks on the I/O connector panel, a standoff in the

left rear corner, and three screws.

IMPORTANT: Correct positioning of the system board is essential for proper

interconnect of the computer with either expansion base. When

installing a system board, be sure the locating pins near the

mounting screws properly engage the system board.

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A connector on the rear of the computer interfaces with either expansion

base to provide additional functionality. The expansion base replicates

the following computer connectors:

o Serial connector

o Parallel connector

o External monitor connector

o PS/2-compatible mouse connector

o Power connector

o External keyboard connector

o All audio connectors except mono microphone jack

Additional MultiBay Expansion Base and MultiBay ISA details are presented

in Section 1.5.

Power Board

The power board is a DC-to-DC converter that provides the required

voltages of +3.3 and +5 volts from one of the power sources (main battery

pack, AC Adapter, or Automobile Adapter).

The power board is provided as a field replaceable unit. To remove and

replace the power board, you must first remove the CPU cover, keyboard,

and processor board. The power board connects to the system board with two

connectors and is secured in place with one screw.

Keyboard

The keyboard is available as an assembly consisting of the following

parts:

o Keyboard

o Keyboard bezel

o Battery release

o MultiBay device release

o EasyPoint II controller

The battery release, MultiBay device release, and EasyPoint II controller

are also available as replaceable units.

To remove the keyboard assembly, the CPU cover must be removed first. The

keyboard ribbon cable (ZIF connector) and EasyPoint II controller cable

must be disconnected. Three screws on the bottom on the system unit and

four screws across the front (inside of the MultiBay and dedicated battery

compartment) must then be removed to release the keyboard.

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The battery release mechanism consists of the following parts:

o Battery release actuator

o Battery release spring

o Battery release holder

o Battery release hook

o Battery release hook spring

All of these components are included in the Latches Kit.

The battery release spring maintains the mechanism in the latched state

until the release actuator is pushed. This action retracts the release

hook from the battery. The release hook spring ensures that the battery

hook firmly engages the battery. The battery release holder serves as a

mounting platform for the other release mechanism components. The release

hook and release hook spring are fastened to the release holder with a

screw. The release spring connects the release actuator to the holder. Theholder is held to the bottom of the keyboard with two screws.

The MultiBay device release mechanism is very similar to the battery

release mechanism and consists of the following parts:

o MultiBay device release actuator

o MultiBay release spring

o MultiBay release holder

o MultiBay release hook

o MultiBay release hook spring

o CD-ROM drive release bar

All of these components are included in the Latches Kit.

The MultiBay device release spring maintains the mechanism in the latched

state until the release actuator is pushed. This action retracts the

release hook from the diskette drive or hard drive. Pushing the release

actuator also causes the CD-ROM drive release bar to eject a CD-ROM drive

if one is installed. The release hook spring ensures that the release hook

firmly engages the device in the MultiBay. The MultiBay release holderserves as a mounting platform for the other release mechanism components.

The release hook and release hook spring are fastened to the release

holder with a screw. The release spring connects the release actuator to

the holder. The holder is held to the bottom of the keyboard with a screw

and standoff.

The EasyPoint II controller supports the mouse buttons and the EasyPoint

II pointing stick. It is mounted to the bottom of the keyboard assembly

directly under the mouse buttons. The CPU cover and keyboard must be

removed to gain access to the controller. Two screws hold the controller

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to the keyboard. Once released, the flat cable can be disconnected from

the ZIF connector on the underside of the controller.

MultiBay

The MultiBay accommodates the following devices:

o Dual-speed, quad-speed, or 6x CD-ROM drive

o Second hard drive

o Second battery pack

o 3.5-inch diskette drive

NOTE: The hard drive must be mounted in the MultiBay hard drive carrier

before it can be installed into the MultiBay.

The computer must be turned off when inserting a drive (not the battery

pack) or removing it from the MultiBay.

Chapter 1.5 Optional MultiBay Expansion Base and MultiBay ISA Expansion Base Features The MultiBay Expansion Base and MultiBay ISA Expansion Base provide fully

integrated desktop capabilities for the computer. The expansion base

eliminates the need to disconnect external devices when you remove the

computer from the expansion base. The optional expansion base has the

following features:

o Two MultiBay device bays

o One serial port

o One parallel port

o PS/2 mouse port

o External keyboard port

o One SVGA CRT port

o Ethernet RJ-45 and BNC ports

o Two Type III PC Card slots

o Audio line out, headphones out

o Audio line in

o IR interface for IrDA wireless operations

o Battery charge indicators

o Drive activity indicators

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o Security features

o Stereo speakers

o ISA expansion slot (MultiBay ISA Expansion Base)

o High performance stereo speakers and new audio bass ports on both sides

of the expansion base for Compaq PremierSound audio system (MultiBay ISA

Expansion Base)

Chapter 1.6 MultiBay Expansion Base and MultiBay ISA Expansion Base ComponentsThe external components on the front and right sides of the expansion base

are shown in Figure 1-4 and described in Table 1-7.

Table 1-7. Expansion Base Components - Front and Right Sides

===========================================================================

Item Description

===========================================================================

1 Monitor support cover slots

2 External options connector

3 Stereo speakers (MultiBay Expansion Base model)

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4 MultiBay II device release button

5 MultiBay II

6 PC Card release buttons

7 Ventilation exhausts (MultiBay ISA Expansion Base model)

8 PC Card slots

9 ISA slot access door (MultiBay ISA Expansion Base model)

10 Stereo speaker (MultiBay ISA Expansion Base model)

11 Security cable slot

12 Docking lever

13 Audio bass port (MultiBay ISA Expansion Base model)

14 Battery lights

15 Docking aid===========================================================================

Additional components on the front of the expansion base and the

components on the left side of the expansion base are shown in Figure 1-5

and described in Table 1-8.

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Table 1-8. Expansion Base Components - Front and Left Sides

===========================================================================

Item Description

===========================================================================

1 MultiBay I device release button

2 MultiBay I

3 Docking sensor probe

4 Stereo speakers (MultiBay Expansion Base model)

5 Alignment guide

6 Power light

7 Power button

8 Infrared port

9 MultiBay drive lights

10 Audio bass port (MultiBay ISA Expansion Base model)

11 Stereo speaker (MultiBay ISA Expansion Base model)

12 Ventilation exhaust (MultiBay ISA Expansion Base model)

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13 AC power connector

===========================================================================

The external components on the rear panel of the expansion base are shown

in Figure 1-6 and described in Table 1-9.

Table 1-9. Expansion Base Components - Rear Panel

===========================================================================

Item Description

===========================================================================

1 External mouse connector

2 External keyboard connector

3 Stereo speaker/headphone jack

4 Stereo line in jack

5 Ethernet RJ-45 connector

6 Ethernet BNC connector

7 MIDI/Game connector

8 External monitor connector

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9 Parallel connector

10 Serial connector

11 Auxiliary fan (MultiBay ISA Expansion Base model)

12 MPEG and TV Video Adapter connector

13 ISA slot cover (MultiBay ISA Expansion Base model)

===========================================================================

Chapter 1.7 Design Overview - MultiBay Expansion Base and MultiBay ISA Expansion Base In addition to replicating the computer I/O panel and offering additional

mass storage device bays, the expansion bases include the following:

o Main board with integrated Ethernet

o MultiBay connector board

o Power supply

o IrDA interface

o Activity lights

o MultiBays with ejectors

o PC Card slots

o ISA expansion board slot (MultiBay ISA Expansion Base model)

o Computer docking mechanism

1.7.1 Main Board

The expansion base main board supports the following major components:

o Ethernet controller (National DP83907)

o PCMCIA controller (Cirrus 6722)

o Super I/O (National 87334)

o Power controller (TMP47P440AF)

The Ethernet controller supports an integrated 10MB/sec Ethernet

subsystem with 10BaseT and 10Base2 interfaces. The Super I/O component

supports the MultiBays.

1.7.2 MultiBay Connector Board

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Table 1-10. Removable Drive Lights

===========================================================================

Index Function Description

===========================================================================

1 Computer diskette drive light Diskette drive in computer MultiBay

is being accessed

2 Computer hard drive/CD-ROM Hard drive or CD-ROM drive in

drive light computer is being accessed

3 MultiBay hard drive/CD-ROM Hard drive or CD-ROM in one of the

drive light expansion base MultiBays is being

accessed.

4 MultiBay diskette drive light Diskette drive in one of the

expansion base MultiBays is being

accessed===========================================================================

Battery Lights

The battery lights are installed on the front right of the expansion base

and share a small PCB with the power button and power light. The board is

installed as a unit from the back side of the expansion base top cover.

The battery lights are identified in Figure 1-8 and described in Table

1-11.

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Table 1-11. Battery Lights

===========================================================================

Index Function Description

===========================================================================

1 Computer MultiBay battery Status of battery pack in computer

light MultiBay

2 Computer battery light Status of battery pack in computer

battery compartment

3 MultiBay II battery light Status of battery in MultiBay on

the right side of the expansion

base

4 MultiBay I battery light Status of battery in MultiBay on

the left side of the expansionbase

===========================================================================

1.7.6 MultiBays with Ejectors

Each expansion base has two MultiBays. Each MultiBay is removable as a

unit with its ejector mechanism. The MultiBay is held to the expansion

base cover with three screws. The MultiBays in the expansion base

accommodate the same drives that are used by the computer and can be used

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to charge batteries. MultiBay I will accept Compaq LTE Elite hard drives.

1.7.7 PC Card Slots

Each expansion base has two Type III PC Card slots that function similarly

to the PC card slots on the computer. Each PC Card slot on the expansion

base supports one Type I, one Type II, or one Type III PC Card. The onlyserviceable part of the PC card slots are the slot doors. The rails and

connectors are incorporated into the main board.

1.7.8 Computer Docking Mechanism

The computer docking mechanism has a lever that protrudes from the right

side of either expansion base and serves to aid in seating the computer

when it is pushed toward the rear of the expansion base. The lever

releases the computer from the expansion base when it is pushed toward the

front of the expansion base.

1.7.9 ISA Expansion Board

The MultiBay ISA Expansion Base provides one slot for an 8- or 16-bit,

full-length industry-standard (ISA) expansion board.

The following provisions must be considered when choosing the type of ISA

expansion board to be installed in the expansion base:

o The enhanced video performance of the Compaq LTE 5000 Family of Personal

Computers drives an external monitor at resolutions up to 1024 x 768 x

256 colors and at selectable refresh rates up to 72 Hz, making the useof ISA graphics controller boards unnecessary. If an ISA graphics

controller card is installed, the system will not operate. Graphics

controller boards are not supported.

o If a National NE2000 or compatible network ISA board is installed, the

built-in ethernet connectors in the expansion base are disabled. To

re-enable the built-in ethernet network feature, the NE2000 or

compatible network ISA expansion board must be removed.

Two Network Interface Cards (NICs) can be enabled at one time as long as

both are not NE2000 or compatible.

NOTE: NICs that have a default address of 300h require setup

configuration changes because the built-in ethernet uses the 300h

address.

o Some Moving Picture Experts Group (MPEG) ISA boards cannot be installed

as they require connection to the "feature connector" of the graphics

controller. This feature connector is not provided on the MultiBay ISA

Expansion Base. MPEG ISA boards with a standard video port (external

monitor connector) that do not require connection to the feature

connector on the graphics controller should function satisfactorily.

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The Compaq MPEG and TV Video Adapter option provides enhanced MPEG

capabilities for use with the Compaq LTE 5000 Family of Personal

Computers. To achieve maximum MPEG functionality support, use the Compaq

MPEG and TV Video Adapter option.

o Due to the vast numbers of ISA expansion boards that are available,Compaq does not guarantee or support every ISA expansion board.

Refer to the documentation accompanying the ISA expansion board being

installed for complete installation and configuration instructions.

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Chapter 2. Troubleshooting

Chapter 2.0 IntroductionThis chapter contains troubleshooting information for the computer. The

basic steps in troubleshooting include:

1. Completing the preliminary steps listed in Section 2.1.

2. Running the Power-On Self-Test (POST) as described in Section 2.4.

3. Running the Computer Checkup (TEST) as described in Section 2.5.

4. Performing the recommended actions described in the diagnostic tables

in Section 2.7 if you are unable to exercise POST or Computer Checkup

or if the problem persists after running POST and Computer Checkup.

Adhere to the following guidelines when troubleshooting:

o Complete the recommended actions in the order in which they are given.

o Repeat POST and Computer Checkup after each recommended action until the

problem is resolved and the error message does not return.

o Once the problem is resolved, do not complete the remaining recommended

actions.

o Refer to Chapter 5 for any removal and replacement procedures that are

recommended.

Chapter 2.1 Preliminary StepsIMPORTANT: Use the AC adapter when running POST, Computer Setup, or

Computer Checkup. A low battery condition could initiate

Standby (Suspend) and interrupt the test.

Before running POST and Computer Checkup, complete the following steps:

1. If a power-on password has been established, type the password andpress Enter.

NOTE: The key icon appears on the status display when the computer is

turned on to indicate that QuickLock/QuickBlank has been initiated.

Type the power-on password to exit QuickLock/QuickBlank. If the

password is unknown, it must be cleared (see Section 2.2).

2. Run Computer Setup (Section 2.3).

3. Position the brightness control actuator and contrast control actuator

(on selected models) in the center of their ranges and leave the

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display open.

4. Turn off the computer and all external devices.

5. Disconnect any external devices that you do not want to test. If you

want to use the printer to log error messages, leave it connected to

the computer.

NOTE: If a problem only occurs when an external device is connected to thecomputer, the problem could be with the external device or its

cable. Isolate the problem by running POST with and without the

external device connected.

6. Use Advanced Diagnostics and loopback plugs in the serial and parallel

connectors if you plan to test these ports. To run Advanced

Diagnostics, complete the following steps:

a. Insert the Diagnostics diskette into the diskette drive and turn on

the computer.

b. At the Welcome Screen, press Ctrl + A.

c. Press Enter to accept OK.

d. Select Computer Checkup (TEST).

e. Select Prompted Diagnostics after "Identifying System Hardware"

completes.

f. Select Interactive Testing and follow the displayed instructions.

Refer to Chapter 3 for description and spare part number for the loopback

plugs.

7. Ensure that the primary hard drive is installed in the computer.

8. Ensure that the battery pack is installed in the computer and the AC

Adapter is connected to the computer and plugged into an AC power

source.

After completing the preliminary steps, run POST (Section 2.4) and

Computer Checkup (Section 2.5).

Chapter 2.2 Clearing the Power-On and Setup PasswordsThe power-on password prevents use of the computer until the password is

entered. The setup password prevents unauthorized changes to Computer

Setup. To clear the passwords, you must remove and replace a jumper on the

system board. If you do not know the passwords, use the following

procedure to clear the password:

1. Complete the preparation for disassembly procedures in Section 5.3.

2. Remove the CPU cover as described in Section 5.5.

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3. Move the jumper on JP1 (Figure 2-1) from pins 2 and 3 to pins 1 and 2.

4. Turn on the computer and run POST.

5. Turn off the computer and move the JP1 jumper to pins 2 and 3 for

normal operation.

Chapter 2.3 Running Computer SetupThe ROM-based Computer Setup displays the current system configuration and

allows you to set system and power management parameters. These parameters

are stored in CMOS, and a backup copy is saved in a parameter block in

system flash ROM.

You can access Computer Setup by pressing F10 when the prompt appears

after you turn on or restart the computer. The following configuration

parameters can be changed in Computer Setup:

o Date and time

o Power conservation (when)

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o Power conservation (level)

o PC Card slot power management

o Hibernation on/off

o Hibernation settings

o Warning beep

o Setup password

o Diskette drive disable

o Serial/IrDA ports disable

o Parallel port disable

o PC Card slots disable

o Resume password on/off

o Boot memory test

o Keyboard numlock

o Boot sequence

o Boot display

o Serial port settings

o Infrared port settings

o Parallel port settings

o Power-on password

o Diskette drive boot disable

o NTSC/PAL

o Windows 95 Power Properties

o Lid closure notification

o Advanced LPT mode

Computer Setup automatically recognizes and configures the system for newCompaq devices. It does this without prompting you for information about

the devices. However, if you add a memory expansion board, the next time

you turn on the computer a prompt appears notifying you of the new memory

configuration.

The first Computer Setup screen displays current settings for the system,

ports, and devices. The status bar at the bottom of the screen gives

instructions for navigating and choosing options. The status bar also

displays descriptions as you highlight menus and menu options.

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NOTE: If the main system board is replaced, the serial number on this

screen changes to 0 (zero).

Select one of the menus from the menu bar at the top of the screen to view

or to change the following configuration settings:

o Initialization startup preferences

o Ports, including serial/infrared, parallel, Ethernet, and MPEG

o Power, including Power Management and Hibernation

o Security, including setup and power-on passwords and disabling devices

2.3.1 Initialization Menu

Select the Initialization menu to set the date and time and to change the

initialization (startup) settings for running the POST memory tests,

numlock on or off, the drive boot sequence, boot display, and lid closurenotification.

NOTE: The boot sequence sets the order in which the system searches for a

bootable drive to start the computer. Before changing the booting

sequence, see "The Hard Drive Boot Sequence" in Appendix C for more

information.

2.3.2 Ports Menu

Select the Ports menu to change the default input/output (I/O) addresses

and interrupt requests (IRQs) for serial/infrared, parallel, and Ethernetports, select PAL or NTSC for the optional MPEG video format, and enable

Advanced LPT mode.

NOTE: If you select conflicting settings for the ports, the system

automatically changes one of the settings.

2.3.3 Power Menu

Select the Power menu to enable or disable Power Management, PC Card slot

power management (not available on LTE 5000, LTE 5100, and LTE 5200

models), low-battery warning beeps, and an external energy saving monitor.

The factory default settings are:

o Power Management Enabled While on Battery

o Conservation Level Medium

o Low-Battery Warning Beeps Enabled

o External Energy Saving Monitor Disabled

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o PC Card Power Off During Standby

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION >>>>>

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o Off - Turns off all power management. The power management icon on the

status panel turns off.

NOTE: You can also temporarily toggle power management off and on by

pressing the Fn+F7 hotkeys. The next time you restart the computer,

the Power Properties setting takes effect.

2.3.4 Security Menu

Select the Security menu to set, change, or delete the setup and power-on

passwords, and to enable/disable QuickLock/QuickBlank, power-on password

from Standby, diskette drives, ports, and PC Card slots.

Setup Password

Use the Setup password to protect the system configuration from

unauthorized changes. After you establish the setup password, you cannot

change the system configuration until you enter the setup password.

IMPORTANT: Type carefully because the password does not display as youtype it. If you choose to, you can use the same password for

setup and for power-on.

The next time you press F10 (after POST) to run Computer Setup, a password

prompt appears on the screen. If you enter the password incorrectly, you

are prompted to reenter the password.

If you forget your setup password, you cannot change the system

configuration until the computer memory is cleared of the password.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION >>>>>

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If you forget your power-on password, you cannot use the computer until

the computer memory is cleared of the password.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION >>>>>

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This chapter contains typical error messages that you may encounter during

the power-on self-test (POST). POST is a series of tests that run every

time you turn on the computer. POST verifies that the system is configured

and functioning properly. A successful POST is followed by one or two

short beeps.

If you receive an error message listed below, follow the recommended

action. If you receive an error message that is not listed, contact your

Compaq authorized service provider. You may also want to run ComputerCheckup from the Diagnostics diskette. Information about running Computer

Checkup is presented later in this section.

If POST detects an error, one of the following events occurs:

o A message with the prefix "WARNING" appears informing you where the

error occurred. The system pauses until you press F1 to continue.

o A message with the prefix "FATAL" appears informing you where the error

occurred. After the message, the system emits a series of audible beeps.

The system then stops.

o The system emits a series of audible beeps. The system then stops.

Warning messages indicate a potential problem exists such as a system

configuration error. When F1 is pressed, the system should resume. You

should be able to correct problems that produce WARNING messages.

IMPORTANT: When a WARNING message includes the prompt to "RUN SCU," run

Computer Setup. (Computer Setup replaces the SCU utility.)

Fatal errors emit a beep and may display a FATAL message. Fatal errors

indicate severe problems, such as a hardware failure. Fatal errors do notallow the system to resume. Some of the Fatal error beep codes are listed

at the end of this section.

Table 2-1. Warning Messages

===========================================================================

Message Description

===========================================================================

Clock not ticking correctly The real time clock is not ticking.

---------------------------------------------------------------------------

CMOS checksum invalid, run CMOS RAM information has been corrupted and

SCU needs to be reinitialized by running Computer

Setup.

---------------------------------------------------------------------------CMOS failure, run SCU CMOS RAM has lost power and needs to be

reinitialized by running Computer Setup.

---------------------------------------------------------------------------

Floppy controller failed The diskette drive controller failed to

respond to the reset command. Power down the

system and check all appropriate connections.

If the diskette drive controller continues to

fail, you may need to replace the system

board.

---------------------------------------------------------------------------

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Floppy disk track 0 failed The diskette drive cannot read track 0 of the

diskette in the drive. Try another diskette.

If the problem persists, you may need to

replace the diskette drive.

---------------------------------------------------------------------------

Floppy information invalid, The drive parameters stored in CMOS RAM do

run SCU not match the diskette drives detected in the

system.

---------------------------------------------------------------------------Hard disk controller error The hard drive controller failed to respond

to the reset command. Check the drive

parameters. Power down the system and check

all appropriate connections.

---------------------------------------------------------------------------

Hardware information does The video adapter type specified in CMOS RAM

not match video card, run does not match the installed hardware.

SCU

---------------------------------------------------------------------------

Keyboard controller failure The keyboard failed the self-test command.

---------------------------------------------------------------------------

Keyboard failure The keyboard failed to respond to the RESET

ID command.

---------------------------------------------------------------------------No interrupts from Timer 0 The periodic timer interrupt is not

occurring.

---------------------------------------------------------------------------

RAM parity error at A RAM parity error occurred at the specified

location xxxx (hex) location.

---------------------------------------------------------------------------

ROM at xxxx (LENGTH yyyy) An illegal adapter ROM was located at the

with nonzero checksum (zz) specified address. An external adapter (such

as a video card) may be causing the conflict.

---------------------------------------------------------------------------

Time/Date corrupt - run SCU The time and date stored in the real time

clock have been corrupted, possibly by a

power loss.---------------------------------------------------------------------------

Unexpected amount of The amount of memory detected by POST does

memory, run SCU not match the amount specified in CMOS RAM.

---------------------------------------------------------------------------

Hard disk xx failure A failure or an error occurred when trying to

(or error) access the hard drive.

===========================================================================

Table 2-2. Fatal Error Messages

===========================================================================

Message Description Beep Code

===========================================================================

CMOS RAM test failed A walking bit test of CMOS RAM 3

location 0E (Hex) - 3F (Hex) failed.---------------------------------------------------------------------------

DMA controller faulty A sequential read/write of the 4

transfer count and transfer address

registers within the primary and

secondary DMA controllers failed.

---------------------------------------------------------------------------

Faulty DMA page A walking bit read/write of the 16 DMA 0

registers controller page registers starting at

location 80 Hex failed.

---------------------------------------------------------------------------

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Faulty refresh A continuous read/write test of port 1

circuits 61h found that bit 4 (Refresh Detect)

failed to toggle within an allotted

amount of time.

---------------------------------------------------------------------------

Interrupt controller A sequential read/write of various 5

failed Interrupt Controller registers failed.

---------------------------------------------------------------------------

ROM checksum incorrect A checksum of the ROM BIOS does not 2match the byte value at F000:FFFF.

---------------------------------------------------------------------------

RAM error at location RAM error occurred during memory test. None

xxxx

---------------------------------------------------------------------------

Parity error at Parity error occurred. None

unknown location

===========================================================================

The following table lists some of the Fatal Error beep codes, along with

the beep sequence (short, long, pause) and the meaning of the beeps.

Table 2-3. Fatal Error Beep Codes

===========================================================================

Beep Code Beep Sequence Explanation Remedy

===========================================================================

0 S-S-S-P-S-S-L-P The DMA page Replace system board.

registers are faulty.

1 S-S-S-P-S-L-S-P The refresh circuitry Replace system board.

is faulty.

2 S-S-S-P-S-L-L-P The ROM checksum is 1. Flash the ROM

incorrect. 2. Replace system

board.

3 S-S-S-P-L-S-S-P The CMOS RAM test Replace system board.

failed.

4 S-S-S-P-L-S-L-P The DMA controller is Replace system board.

faulty.

5 S-S-S-P-L-L-S-P The interrupt Replace system board.

controller failed.

6 S-S-S-P-L-L-L-P The keyboard Replace system board.

controller failed.

7 S-S-L-P-S-S-S-P Graphics adapter is Replace system board.faulty.

8 S-S-L-P-S-S-L-P Internal RAM is Replace processor

faulty. board.

---------------------------------------------------------------------------

S = Short, L = Long, P = Pause

===========================================================================

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9. Select one of the following from the Test Option menu:

o Quick Check Diagnostics. Runs a quick, general test on each device

with a minimal number of prompts. If errors occur, they display when

the testing is complete. You cannot print or save the error

messages.

o Automatic Diagnostics. Runs unattended, maximum testing of each

device with minimal prompts. You can choose how many times to run

the tests, to stop on errors, or to print or save a log of errors.

o Prompted Diagnostics. Allows maximum control over testing the

devices. You can choose attended or unattended testing, decide to

stop on errors, or choose to print or save a log of errors.

10. Follow the instructions on the screen as the devices are tested. When

testing is complete, the Test Option menu appears.

11. Exit the Test Option menu.

12. Exit the Diagnostics menu.

2.5.2 View System Information (INSPECT)

The View System Information (INSPECT) utility provides information about

the computer and installed or connected devices. You can display, print,

or save the information.

Follow these steps to run View System Information (INSPECT) from the

Compaq Diagnostics diskette:

1. Turn on the external devices that you want to test. Connect the printer

if you want to print the information.

2. Insert the Compaq Diagnostics diskette in drive A.

3. Turn on or restart the computer. The computer starts from drive A, and

the Diagnostics Welcome screen appears.

4. Press Enter to continue. The Diagnostics menu appears.

5. Select View System Information (INSPECT) from the Diagnostics menu.

6. Select the item you want to view from the following list:

===========================================================================

System Memory

ROM Audio

Keyboard Operating system

System ports System files

System storage Windows files

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Graphics

===========================================================================

7. Follow the instructions on the screen to cycle through the screens, to

return to the list and choose another item, or to print the

information.

Chapter 2.6 Diagnostic Error CodesDiagnostic error codes occur if the system recognizes a problem while

running the Compaq Diagnostic program. These error codes help identify

possibly defective subassemblies.

Tables 2-4 through 2-16 list possible error codes, a description of the

error condition, and the action required to resolve the error condition.

IMPORTANT: Retest the system after completing each step. If the problemhas been resolved, do not proceed with the remaining steps.

For assistance in the removal and replacement of a particular subassembly,

see Chapter 5, "Removal and Replacement Procedures."

Table 2-4. Processor Test Error Codes

===========================================================================

Error Code Description Recommended Action

===========================================================================

101 - xx CPU test failed Replace the processor board and retest.

---------------------------------------------------------------------------

102 - xx Coprocessor or 1. Run the Configuration and

Weitek Error Diagnostics Utilities.

2. Replace the processor board and

retest.

---------------------------------------------------------------------------

103 - xx DMA page registers Replace the system board and retest.

test failed

104 - xx Interrupt controller

master test failed

105 - xx Port 61 error

106 - xx Keyboard controllerself-test failed

107 - xx CMOS RAM test

failed

108 - xx CMOS interrupt test

failed

109 - xx CMOS clock test

failed

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110 - xx Programmable timer

load data test

failed

113 - xx Protected mode test

failed

---------------------------------------------------------------------------

114 - 01 Speaker test failed 1. Check system configuration.2. Verify cable connections to speaker.

3. Replace the system board and retest.

===========================================================================

Table 2-5. Memory Test Error Codes

===========================================================================

Error Code Description Recommended Action

===========================================================================

200 - xx Memory machine ID The following steps apply to error

test failed codes 200 - xx and 202 - xx:

202 - xx Memory system ROM 1. Flash the system ROM and retest.

checksum failed 2. Replace the system board and retest.

---------------------------------------------------------------------------203 - xx Write/Read test The following steps apply to error

failed codes 203 - xx through 215 - xx:

204 - xx Address test failed 1. Remove the memory module and retest.

2. Install a new memory module and

211 - xx Random pattern test retest.

failed

214 - xx Noise test failed

215 - xx Random address test

failed

===========================================================================

Table 2-6. Keyboard Test Error Codes

===========================================================================

Error Code Description Recommended Action

===========================================================================

300 - xx Failed ID Te